SLC9A1 and neoplasm: Another study by Grillon et al.[42] reports that the distribution of NHEs and MCTs in rat brain gliomas are heterogeneous–the relative intensity of NHE1 (isoform 1) peaks at an average distance of 0.33±0.027 mm from the edge of the tumour and expression of the MCT1 (which can transport lactate and H+ either out of or into cells [43]) peaks further into the glioma (1.05±0.14 mm from the edge of the tumour).